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A chemical element, in the periodic table yttrium has the symbol Y and atom number 39, and an atomic mass of 88.9059. The ground state electronic orbitals are 4d5s. The metal is silverish in color and lustrous, and is found in almost all rare earth minerals. Yttrium-europium compounds are found in the red phosphors of color televisions and this represents a major usage of the element.
The common oxidation state of yttrium is +3.
This element is named after the Swedish town of Ytterby.
External Link:
Los Alamos National Laboratory's Chemistry Division: Periodic Table - Yttrium
See: Periodic Table